Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1997-2001 Cadillac Catera . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.

PART

COLOR

LOCATION

12 VOLT
CONSTANT

RED (+)

@ IGNITION SWITCH HARNESS

STARTER

BLACK/RED (+)

@ IGNITION SWITCH HARNESS

STARTER
2

N/A

IGNITION
1

BROWN (+)

@ IGNITION SWITCH HARNESS

IGNITION
2

N/A

IGNITION
3

N/A

ACCESSORY/HEATER
BLOWER 1

BROWN (+)

@ IGNITION SWITCH HARNESS

ACCESSORY/HEATER
BLOWER 2

N/A

KEYSENSE

N/A

PARKING
LIGHTS ( - )

BROWN/WHITE (-) or RED/WHITE (-)

@ BCM, 32-Pin Plug, See NOTE #2

PARKING
LIGHTS ( + )

GRAY/GREEN (+)

@ the PARKING LIGHT RELAY, See NOTE #3

POWER LOCK

BLACK/BROWN (TYPE B)

@ BCM, 24 Pin PLug, Pin A8, See NOTE #2

POWER UNLOCK

BLACK/PURPLE (TYPE B)

@ BCM, 24 Pin Plug, Pin A6, See NOTE #2

DOOR TRIGGER

GRAY (-)

@ BCM, 24 Pin Plug, Pin B2, See NOTE #2

DOMELIGHT
SUPERVISION

USE DOOR TRIGGER

TRUNK RELEASE

BLACK/RED (5-Wire) See NOTE #4, (Requires #775 Relay)

@ RELAY, BEHIND BCM

SLIDING
POWER DOOR

N/A

HORN

BROWN/WHITE (-)

@ BCM, 32 Pin Plug, Pin C4, See NOTE #2

TACH

GREEN (AC)

@ ECM, See NOTE #5

WAIT TO
START LIGHT

N/A

BRAKE

BLACK/YELLOW (+)

@ SWITCH ABOVE BRAKE PEDAL

FACTORY
ALARM DISARM

BROWN/PURPLE (-)

@ BCM, 24 Pin Plug, Pin A3, See NOTE #2

ANTI-THEFT

GM's TRANSPONDER SYSTEM, See NOTE #1

@ IGNITION SWITCH TUMBLER

EXTRA
INFORMATION

NOTE #1: This vehicle is equipped with GM'S TRANSPONDER ANTI-THEFT SYSTEM and Requires
791 Bypass Module and an Extra Ignition Key for Remote starting operation.
to order go to the SECURITY BYPASS MODULE Page on this website.
NOTE #2: the BCM is located in the PASSENGER KICK PANEL.
NOTE #3: the PARKING LIGHT Relay is located to the RIGHT of the STEERING COLUMN.
NOTE #4: the TRUNK Rlease System on this vehicle uses a 5-Wire Circuit that will require
an extra Relay part #775, to connect See DIAGRAM.
NOTE #5: the ECM is located in FRONT of the Driver Strut tower, the TACH wire is in the 80 pin
plug.